VLF means Incredibly Reduced Frequency and is the same technologies Employed in detectors designed for coins, jewelry, and relics. VLF detectors broadcast at frequencies measured in kilohertz ranging from 3 kHz to 70 kHz. Here are five explanation why you could opt for a VLF over a PI The following https://forum.programosy.pl/gold-detector-finds-that-made-history-vt356068.html